<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function* generator(i) {
            yield i;
            yield i * 2;
        }

        const gen = generator(10);

        console.log(gen.next().value);
        console.log(gen.next().value);

    </script>
</body>

</html>